Hi,   Reload your 9500 switch and boot into rommon. To do his push the stat button constantly (or whatever it's called nowadays) as it's booting up until you get the "switch:" prompt. It can take up to a minute.   Type "set" to list the rommon variab...

Hi, I had a similar issue. We run 2 x 9500 40X switches on 16.8.1a and the stackwise refused to work.   I raised a TAC with Cisco who advised to change the rommon MAC_ADDR variable to include a 00 as it was missing from the front (eg :AB:CD:EF:GH:IJ)...